In building my own Lift Arms and not welding them, left me with coming up with a way to mount the safety switch for the heating elements. I'm all for safety and not wanting to simply leave this switch out. I needed a new place and way to mount it. The goal of the switch is to only have the heat on when the frame that holds the plastic is in place at the top and ready to be heated. So I decided to mount the switch under the deck and trigger it off the frame guides. It's a funky little block of wood that holds the switch and a hinge and mounts to the side of the lower frame. It all makes more sense if you see the pictures.

It works like a charm. As soon as you lift the bar to slide the plastic up the heat starts coming on.